Senior Software Engineer (Java) Remediation Agent (fmd)

Who is Sonar

Sonar helps prevent code quality and code security issues from reaching production, amplifying developers’ productivity in concert with AI assistants and improving the developer experience with streamlined workflows. Sonar analyzes all code regardless of who writes it—your internal team, genAI or third parties—resulting in more secure, reliable and maintainable applications. Rooted in the open source community, Sonar’s solutions support over 30 programming languages, frameworks and infrastructure technologies. Today Sonar is used by 7 M developers and 400 K organizations worldwide, including the DoD, Microsoft, NASA, MasterCard, Siemens and T‑Mobile.

We believe in developing great products that are supported by great internal teams and a strong culture. We are highly committed to and obsessed with the company, users, each other and our open source community. We have high standards and hold each other accountable for acting with positivity, dedication, thoughtfulness, empathy and passion daily.

We are deliberate in our decisions with high clarity of intention. At the same time we feel extreme urgency and move forward quickly.

And lastly we are highly effective and operationally efficient . We operate collectively as One Team to accomplish our goals. At Sonar CODE is more than just an acronym—it is a mindset that defines daily operations.

Why You Should Apply

At Sonar we are a group of brilliant, motivated and driven professionals working hard to help supercharge developers to build better, faster. Sonar helps continuously improve code quality and code security while reducing developer toil. This means that developers can focus on doing more of what they love and less of what they don’t. Our solutions don’t just solve symptoms of problems; we help fix issues at the source for all code, whether it’s developer‑written, AI‑generated, or from third parties.

We have a dynamic culture with employees worldwide and hub offices in the USA, Switzerland, the UK, Singapore and Germany. Team members should be able to come to work every day, work on a product they are proud of, love what they do and feel energized by their peers. With our roots deep in the open source community we’re all about the mission: supercharge developers to build better, faster.

The Impact You Will Have

At Sonar we believe that simply reporting code issues is not sufficient. To truly level up the quality of the world's software we must empower millions of developers to fix them automatically. With over 400 000 enterprises relying on our products we hold a unique lever to shape how software is built.

Recent breakthroughs in AI have made autonomous remediation a reality but one major hurdle remains: Trust. Generative AI makes mistakes and enterprises cannot automate what they do not trust. This is where you come in. As a Senior/Staff Engineer you will architect the backend for Verified Autonomous Remediation, a sophisticated Agentic workflow that doesn’t just generate code but rigorously tests and validates it using Sonar’s analysis engine. You will tackle the hard engineering problems required to close the Trust Gap.

What You Will Do Daily

• Architect the Unified Remediation Engine. You will design the high-throughput decision logic that powers our remediation efforts and build backend services that intelligently route requests between deterministic instant QuickFixes, LLM‑based reasoning fixes and complex Agentic flows.
• Build Robust Agent Architecture. You will contribute to the Sonar Remediation Agent code, transitioning research concepts to a resilient high‑scale production service, and implement self‑healing workflows where the Agent iteratively fixes the code it produces until the build is green.
• Solve the Sandboxing Problem. You will architect the secure execution environments required to run untrusted AI‑generated code and design the isolation layers that allow Agents to iterate on code improvements without compromising our infrastructure.
• Engineer for Reliability & Safety. You will implement critical safety mechanisms, such as Circuit Breakers, to automatically reroute requests to the proper engine when acceptance rates drop. You will own the cost/performance trade‑off ensuring our AWS architecture scales to millions of events without letting token costs spiral.
• Act as a Technical Force Multiplier. Beyond building systems you’ll mentor the squad through design reviews and collaborate with the Research team to ensure our Agent is not just state‑of‑the‑art but production‑safe.

The Experience You Will Need

• Strong Backend & Cloud Expertise. You have 8 years of experience building scalable, resilient systems, with deep expertise in AWS architecture and designing for high availability, low latency and cost control.
• Polyglot Ecosystem (Java & Python). You are comfortable operating in a hybrid environment: Java for deep integration with the Core Sonar analysis engine and Python for the AI/Agent reasoning layer. You should be strong in one and capable in the other.
• Systems Thinking. You understand that AI in production is mostly Systems Engineering. You know how to handle asynchronous, event‑driven architectures, manage queues and design sandboxed execution environments to run untrusted code safely.
• AI & LLM Integration. You have practical experience building applications that orchestrate LLMs (OpenAI, Anthropic or hosted open models), including backend complexity of RAG context window management and prompt engineering at scale.
• Data‑Driven Mindset. You care about the why. You want to build telemetry pipelines that distinguish between Bad UX and Bad Code, focusing on the metrics that matter.

Why You Will Love It Here

• Our culture and mission set us apart. We have a dynamic work culture that values respect and kindness and embraces the right to fail (and get right back up again!).
• Great people make a great company. We value people skills as much as technical skills and strive to keep things friendly while still being passionate leaders in our domains.
• We have a flexible work policy that includes 3 days in‑office and 2 days work‑from‑home each week for those located near our office locations; some locations such as Dubai, India, Japan and Australia operate fully remotely.
• We have a growth mindset. We love learning and believe continuous education is critical to our ever‑changing industry; new skills are necessary and we’re happy to help our team acquire them.
• As the leader in our field our products and services are as strong as our internal team members.
• We embrace transparency with regular meetings, cascading messages and updates on the growth and success of our organization.

Benefits of Working With Sonar – Bochum

• Pension Scheme: 1st Pillar (Unterstützungskasse) – automatically financed by Sonar (3 % of gross salary).
• Pension Scheme: 2nd Pillar (bAV) – voluntary 15 % contribution by Sonar from social security savings.
• We encourage usage of our robust time‑off allocations with 28 PTO days for employees based out of the Geneva region plus additional days based on seniority and circumstances.
• Sonar recognizes holidays on the working calendar. If the holiday date occurs on a Saturday we recognize the day on the preceding Friday; if it occurs on a Sunday we recognize the day on the following Monday.
• Public transport reimbursement of 60 % for annual subscription.
• Generous discretionary Company Growth Bonus paid annually.
• Global workforce with employees in 20 countries representing 35 unique nationalities.
• We have an annual kick‑off somewhere in the world where we meet to build relationships and goals for the company.

We Value Diversity, Equity and Inclusion

At Sonar we believe that our diversity is our strength. We are a global company that values and respects different backgrounds, perspectives and cultures.

We are committed to fostering a diverse and inclusive work environment where everyone feels valued and empowered to contribute their best. We are proud to be an equal‑opportunity employer and welcome all qualified applicants regardless of race, color, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, disability, age or veteran status.

All offers of employment at Sonar are contingent upon the precise results of a comprehensive background check and reference verification conducted before the start date.

Applications that are submitted through agencies or third‑party recruiters will not be considered.

We may use artificial intelligence (AI) tools to support parts of the hiring process such as reviewing applications, analyzing resumes or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed please contact us.

Required Experience: Senior IC

Employment Type: Full‑Time

Vacancy: 1